Power Outage Reports

August 13, 2016

At approximately 10:15pm on Saturday, August 13th,  a power outage occurred in the Quad District of the campus.  The outage occurred when some old cable splices let go on the C5 loop.  The High Voltage crew will have this section of antiquated cable and splices replaced by the end of the week.  The following buildings were out of power for approximately 2 hours;  Shields Library, Hart Hall, Walker Hall, and the Student Community Center.  No significant impacts were reported.

January 22, 2016

At approximately 4:00 pm on Friday, January 22nd, a power outage occurred when one of our large breakers at the Main Substation failed.  More specifically, the G100 breaker on our G-Switchgear building failed, which took out the G-Transformer.  All circuits on the G-System were transferred to our backup F & D systems.

August 22, 2015

At approximately 2:40 pm on Saturday, August 22nd, the high voltage crew momentarily blinked power on the B4 feeder loop.  This short outage was the result of a switching error. The High Voltage crew will address this issue by revisiting their standard procedures. 

Facilities affected included:

  • Fleet Services
  • Utilities Headquarters Trailer
  • Unitrans
  • CNG Facility
  • AMRL
  • Putah Creek Lodge
  • BMS Electric Shop
  • UW5
  • SSL9
  • Custodian
  • Bargain Barn
  • Cole A,B, & C

April 29, 2015
At approximately 10:50 a.m. this morning, the entire UC Davis campus experienced a momentary “blink” in power service. This event was inadvertently caused by PG&E operational actions at their Rio Oso Woodland Substation. PG&E does not foresee a recurrence of this particular problem.

December 16, 2014
At approximately 7:30 a.m., a power outage occurred at the Primate Center, affecting TBs 132, 133, 141, & 142. The outage occurred during a scheduled routine emergency generator test. The generator’s automatic transfer switch malfunctioned and locked itself out, preventing the technician from immediately switching back to normal utility power. The outage lasted approximately 45 minutes. Repairs on the switch will be implemented in the next few days in coordination with the associated customers.

December 13, 2013
At approximately 7 a.m. this morning, a partial power outage occurred at Thurman Lab. The problem is believed to be associated with the high voltage transformer feeding the 480 volt system in the building. The high voltage crew replaced the transformer and full power was restored to Thurman Lab at approximately 10:28 a.m.

October 10, 2013
At approximately 3:45 p.m., the entire campus experienced a brief power blink due to a PG&E outage at their Brighten Substation. This is one of two stations that provide transmission power at 115 kV to the campus. PG&E did not explain what caused the outage.

August 24, 2013
At approximately 5:15 p.m. on Saturday, August 24th, a fire along County Road 98 near the landfill, burned a riser on the high voltage overhead system. This riser provides power to the landfill only. Sensing the high voltage cable burning, the recloser protecting this section of overhead line operated approximately six times before the circuit burned clear. No customers, other than the landfill experienced an extended power outage. The six blinks were all momentary. The high voltage crew responded and was able to isolate the damaged riser from the rest of the system by approximately 6 p.m.

June 28, 2013
At approximately 9:40 a.m. this morning, the C5 loop was without power for approximately 2 minutes. During a switching procedure associated with a system expansion, one of the older circuit interrupters malfunctioned. The faulty switch will be replaced during an upcoming project. No significant impacts were reported.

December 3, 2012
Following one of the larger rainfalls in Davis for many years, two large-scale outages occurred.

At approximately 10:45 a.m., a device at the campus substation failed, taking down a large portion of the central campus, including: Earth and Physical Sciences, the domestic water reservoir, Watershed Sciences, Academic Surge, all of the Cole Facility, Meyer Hall, Putah Creek Lodge, Central Garage, Utilities Headquarters, AMRL, Unitrans, Tercero Dorms & Dining Commons, Dairy Barn, Geidt Hall, and Life Sciences. These loads were switched to a back-up feeder, and power was restored by 12:15 p.m. We can attribute this one to rats and water. Rats had earlier chewed away insulation from a control cable, which then shorted when the conduit was flooded by the heavy rains.

Later, at approximately 5:15 p.m., numerous customers in the West Campus lost power. Customers that were affected include: the Student Farm, Sewer Lift Station 12, Western Center for Ag Equipment, Los Rios Community College, the Weather Station, WS&E Shed & Instrumentation Trailer, Agronomy Seed, West Village Trailer, Veg Crops, CEPRAP, Chronic Accelerator, Lab Repro Biology, Suber House, Sewer Lift 11, Bee Biology, Dung Beatle, INS Pest Management, Pomology, Network 21 Facility, Swine Facility, Feed Mill, Cobalt/Root Stalk/Lath 6, Germplasm, Bay 8, Straloch Storage, AH Shop, FPMS, DANR, Sewer Lift 10, Domestic Well 7A, Landfill Scalehouse, and all of Primate. A tree branch, weakened from the recent storm high winds, apparently fell across the power lines, causing protective devices to close. High voltage crews restored power at approximately 7:50 p.m.

July 25, 2012
At approximately 10:28 a.m., a power outage occurred on a portion of the West Campus. The outage was caused by a large goose contacting overhead high voltage lines in the Primate District. The goose caused a line to line fault, which tripped a protection device. The high voltage crew assessed the situation and determined that no damage had occurred. They reset the system and restored power to the affected customers. The outage lasted approximately 20 minutes. Affected Facilities included: Los Rios College, Agronomy Seed, Veg Crops greenhouses, Western Center for AG, Sewer Lift 12A, Agronomy, Foundation Seed, APCARU, DANR, Swine Facility, Feed Mill, FPS, Germplasm, Pomology, CNPRC, and an assortment of smaller facilities.

May 11, 2012
At approximately 5:30 a.m. this morning a power outage occurred on the West Campus affecting the following facilities: Geotechnical Modeling Facility, Water Hydraulics, and Aquatic Weed Complex. Power was restored to all customers at approximately 8:35 a.m. The outage was caused by a large goose flying into the overhead lines. This event caused a high voltage circuit interrupter to open per design to clear the area affected. In addition, the upstream protective device also operated as designed. This resulted in a quick power blink to a larger number of West Campus customers.

October 13, 2011
At approximately 1:20 p.m., all customers on the West Campus lost power. The outage occurred when a large crane contacted the overhead 12 kV lines at Primate as part of a construction project in the area. Power was restored to all customers with the exception of the north field corrals by approximately 1.55 p.m.

September 9, 2011
At approximately 10:05 a.m., a 3–5 minute outage occurred, affecting the following facilities: Mrak Hall, Alumni Center, Environmental Horticulture, University Club, Wyatt Snack Bar & Theater, Grounds, Sproul, Olson, Old Heating Plant, Art, Drama, Music, AOB4, Voorhies, Shields Library Mechanical Room (almost all of Shields was unaffected), and Utility Well 3. The brief outage was the result of a switching error, made by the high voltage crew. The crew was in the process of transferring loads following some preventive maintenance work at the campus substation. Utilities is reviewing our switching procedures to mitigate the potential for future avoidable outages of this kind. We apologize for any impacts that resulted from the outage.

August 6, 2011
At approximately 3:30 a.m., a power outage occurred on the main campus affecting the following buildings: West Parking Structure, Growth Chamber Facility, ARC, ARC Pavilion, Men’s baseball stadium, Sewer Lift 5A, and the adjacent rec fields. The high voltage on-call employees were able to isolate the problem and restore power to all customers at approximately 6:30 a.m. The problem was later found to be a failed conductor, which may have been defective or damaged in the field.

August 5, 2011
At approximately 2:30 p.m., the West Campus experienced a brief (less than 2 second) power blink. The crew discovered a dead goose under a section of overhead line in the Primate Complex, near the North cages. This area has a high concentration of bird activity. In recent months, the high voltage crew has installed bird insulation at most equipment poles, and line spacers on several of the longer overhead spans in the area. The goose contacted the line in mid span, at a location that cannot be insulated.

January 11, 2011
A brief power "blink" occurred for in the west campus (most facilities west of Highway 113) this morning at 8:10 a.m. The momentary outage likely occurred due to another avian short circuit, though no bird victims were found. Power was automatically restored when the fault cleared. This event caused some automatic generators to start.